I Just Started Taking Mirtazapine. I Take It At 2100.

i just started taking mirtazapine. i take it at 2100. knocks me out in an hour. when i wake up, and all throughout the day i am light headed, unbalanced( I am unsteady on my feet, walking into door frames and walls,) and my hands feel like theyre asleep, better yet, that numbish feeling that happens when blood flow returns to them. Questions are, is this normal? If so, is there anything I can do to help alleviate these side effects?